OpenVPN cannot access network on different NIC

[salmanbukhari]

I am trying to connect two clusters via VPN. One cluster is on AWS and I have another machine at local premise with two NIC cards.One NIC has public Ip and other is connected to the internal network. When I connect these two I can access or ping all nodes on AWS by private IP from my local node. But I cannot ping any node other than directly connected node from AWS. The default gateway on the local node is of the public IP provider. Following are my settings

root@ubuntu-VirtualBox-b-1:~# route -n
Kernel IP routing table
Destination    Gateway        Genmask          Flags Metric Ref    Use Iface
0.0.0.0        122.139.79.254  0.0.0.0            UG    0      0        0 eth1
10.0.0.0        169.254.255.1  255.255.0.0    UG    0      0        0 tun0
122.139.79.0    0.0.0.0        255.255.255.0    U    1      0        0 eth1
169.254.255.1 0.0.0.0        255.255.255.255 UH    0      0        0 tun0
192.168.23.0 192.168.23.213  255.255.255.0  UG    0      0        0 eth0
192.168.23.0    0.0.0.0        255.255.255.0  U    1      0        0 eth0

tun0 is VPN and eth0 is local network and eth1 is public.

I am not able to ping to 192.168.23.XX through the VPN from machines 10.0.0.5